GPT-5 Surprise Lab Mirror Proofs System — Three-Layer Verification Architecture

GPT-5s Surprise Lab Mirror Proofs system uses a three-layer verification architecture: mirror (content checksum), canonical (GitLab Pages served), and raw (direct repository access). The mirror and raw layers serve as parity anchors; the canonical layer may show intermittent GitLab Pages drift documented as heartbeat events. The system includes a Quick Verify panel, Most Recent Proof index, and poll log with NO_NEW_200 trail monitoring.